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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --turbofan
// Ensure that we properly check for elements on the prototypes.
function foo(o) {
var s = "";
for (var i in o) s += i;
return s;
}
var o = {};
%PrepareFunctionForOptimization(foo);
assertEquals("", foo(o));
assertEquals("", foo(o));
%OptimizeFunctionOnNextCall(foo);
assertEquals("", foo(o));
Object.prototype[0] = 1;
assertEquals("0", foo(o));
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